#mainBox {
    width: 300px;
    margin: 100px auto;
}
#mainBox>h2{
    text-align: center;
}
#option{
    border: 1px solid rgb(126, 162, 163);
    display: flex;
    background-color: rgb(255, 255, 255);
    border-radius: 10px;
    box-shadow: 1px 1px 5px gray;
    background-image: url("../img/RW001.jpg");
    background-size: cover;
}
#option>a{
    display: block;
    flex: 1;
    margin: 20px;
    height: 50px;
    line-height: 50px;
    border-radius: 20px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    color: rgb(73, 25, 31);
    box-shadow: 1px 1px 5px gray;
    font-size: 14px;
    font-weight: bold;
    
}
#option>a:hover{
    background-color: rgba(0, 0, 0, 0.4);
    color: white;
}